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Q: Which one of the following type of stones is used for fire resistant masonry?
  • A. Fine grained granite
  • B. Limestone
  • C. Slate
  • D. Compact sandstone
Correct Answer: Option D - Compacted sandstone is a better fire resistance. • It is a solid rock and is naturally found of the bottom of the stacks. • The surface of sand stone is rough
D. Compacted sandstone is a better fire resistance. • It is a solid rock and is naturally found of the bottom of the stacks. • The surface of sand stone is rough

Explanations:

Compacted sandstone is a better fire resistance. • It is a solid rock and is naturally found of the bottom of the stacks. • The surface of sand stone is rough